In the present study, a total of 42 Pati ducks were utilized. The ducks were randomly divided into seven (7) groups consisting of six (6) birds in each group. The seven groups of birds were sacrificed at 7 different age viz. day old, 2 weeks, 4weeks, 8weeks, 20weeks, 30weeks and 40 weeks. The location and relative topographic in-situ position of the thyroid gland was recorded. Both the thyroid glands were taken out and length and breadth of each of them were recorded. The paired thyroid glands in the Pati ducks were located on either side of the trachea close to the vascular angle formed by the subclavian artery and common carotid artery. Length and breadth of the thyroid gland also showed an increasing trend with age.